Extracting apparatus.



c. H. F. LEMBKB.

EXTRAGTING APPARATUS.

APPLICATION FILED APR.9,1909

Patented Sept. 13, 1910.

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CARL H. F. LEM'BKE, 0F TOLEDO, OHIO.

EXTBACTING APPARATUS.

Speciication of Letters Patent.

Patented Sept. 13, 1910.

Application mea April s, 1909. serial in. massa To all whom it may'cmwem:

Be it known that I, CARL H. F. LEMBKE, a citizen of the United States, residing at Toledo, in the county of Lucas and State of Ohio, have invented new and useful Imratus using a solvent as the extracting agent and so constructed as to secure a rapid and economical extraction of the substance and recovery of the solvent for further use.

The invention consists of the features of construction, combination and arrangement of parts hereinafter fully described and claimed, reference bein hadzto the accom panying drawings, in w ich Fi re 1 is a sectional'elevation of the comp ete apparatus. Fig` 2 is a bottom plan view of a sprayer forming a art thereof.

Referring to the drawin extracting vessel formed o inner and outer sliells,'providing an extracting chamber 2 and a heating jacket 3 surrounding said chamber and closed a ainst communication therewith. The cham er 2 is closed at its upper end by a dome head 4 and has a bowlshaped bottom or head 5, from which leads a discharge pipe 6, having a valve 6'. Pipes 7 and 8 communicate with the chamber l2 through the respective heads 4 and 5 and are rovided with valves 7 and 8', while a simi ar pipe 9 communicates with the jacket and is provided with a valve 9. These pipes 7, 8 and 9 are designed to supply steam to the extracting chamber and )acket from a boiler or other source of steam su ply, gages li the steam pressure in eit ermay be determined.

The material from which the essential oils or active substance is to be extracted is introduced, in a suitable comminuted condition, into the chamber 2 throu h a manhole 12 havirig a closure plate 13 ang is supported in the bottom of said chamber upon a perforated filter plate 14 arranged above the bottom 4. A manhole 15 is also provided for the removal of the waste substance after extractionand is provided with a cover 16.

, 1 esignates anisa dri pipe 17 for the discharge of the water o condensation of the steam therein. At the top of the chamber 2'is\a rose or annular sprayer 18, 'for a purposehereinafter 60 described. i

A tank or reservoir 19, 'to contain a suitable solvent, is arranged above the vessel l and communicates with the top of chamber 2 through a pipe 20 having a valve 21 there- 65 in. This vtank is provided with a suitable filling inlet 22 and a gage 23 for ascertaining the quantity of solvent therein. A retort or vaporizer 24 is arranged on a lower level than the vessel 1 and surrounded by 70 a steam jacket 25, with which connects a steam supply pipe 26 provided with a valve 26. This retort 24 is provided with a ressiire gage 27 and a'glass gage 28, and eading upward from its bottom and to the exterior through its top is a liquid conducting pipxe 29, whichextends to and connects with t e pi e 6 above the valve 6 and is provided ad]acent said pipe 6 with a valve 25). From the top oft lean-Is a vapor delivery pipe '30 connecting at its upper end with a` pipe 31 leading to the top of the chamber 2 of vessel 1 and also connecting with the upper end of the coil of a condenser 32 arranged above said 85 vessel 1. The ipe 30 is provided with a valve 30 and t e pipe 31 with a valve 31 A steam exhaust pipe 33 connects with pipe 31 between the vessel 1 and .valve 31 and is provided with a valve 33. The pi e 33 is 90 connected in practice with any suitab e type of exhaust pump.

The lower end of the coil of the condenser is connected with pipes 34 and 35,

which are respectively provided adjacent thereto with valves 34 and 35. The ipe 34 leads v into the top of the chamber 2, w ere it is connected with the rose or sprayer 18 at intervals around its circumference by a series of radial branches 36. The pipe 35 100 vided with a valve 37. VThe con ensei' may 105 be cooled in any of theordinary Ways.

Having thus described the construction of the apparatus, the operation thereofis as follows: The Wood or other vmaterial having been introduced into the extracting chamber 2, through the manhole 12, and the latter sealed, by applying the plate 13, the valves e vaporizer also 80 21, 29', 30', and 34' are opened and valves c', 7', s', 9', e1', e3', 35', 26' and 37a closed.

i The solvent contained invreservoir 19 then flows through pipe 20 into the extracting chamber 2, percolates through the mass of material therein, and passes with the amount of turpentine taken up thereby through 'the filter plate 14 and pipe 29 to the vaporizer 24. After all the solvent, or the amount reuired has discharged' from the tank 19 the valve 21 is closed. When the v aporizer is two-thirds filled with the filtrate, which may be determined by the glass 28, the valves 31' and 33 are closed and valve 26' is opened to admit steam through the pipe 26 to the jacket 25, whereby the vaporizer w1ll be heated to a sufficient temperature to convert its contents into vapor. The vapor passes from the vaporizer through the pipe 30 to the condenser 32, wherein it is llqueied, and in this form the filtrate ows through the pipe 34 to the rose or sprayer 18, by which it is sprayed on the material in the chamber 2, percolates downward there- 2.5 .through and extracts a further amount of turpentine and discharges from the extractor into the vaporizer, in which it is again vaporized.` The vapor is then again conducted to the condenser and the liqueed andfurther enriched nitrate fed to the extractor for a repetition of the above-described operation. Steam is now allowed to enter the jacket through pipe 9 by opening valve 9 in sufficient amount to keep the contents at F. By opening the valve 6' to discharge a small quantity of the liquid its temperature may be determined at desired intervals. This vstep of heating the contents to 50 degrees F. is continued until all of the turpentine, essential oils or alkaloid is extracted from the material, which may be determined by testing a quantity of the product obtained by opening valve 6'. At this stage valve 26' is closed to out olf the supply of steam to the vaporizer and the liquid solvent and extract allowedV to pass into the vaporizer. The valves 29', 30' and 34 are then closed and valves 8', 9', 31' and 35' opened, thus cutting olf communication between the extractor and vaporizer and the latter and condenser, and opening communication between the extractor and recovery -tank 37 via the condenser, and atA the same time admitting steam to the extracting chamber 2 and jacket 3. rlhe extractor is -thus heated until all the remainder of the solvent and extract faire vaporized the va or assin throu h t e pipe 3l to tlie condeiiiserp in wlgiich itigs liquefied, the resultant solvent and extract passing down into the receptacle 37 Valves 8', 9', 3l' and 35' are then closed and valves 7', 29 and 37 opened, the 'live steam entering through pipe7, forcing vall the water of condensation of the steam previously admitted into the chamber 2 into the vaporiz'er, and

the entire contents of the latter through pipe' and exhaust steam remaining in the chamber j 2 sucked out by a suitable pump or exhauster. When the extractor is suiiiciently cool, the waste material is drawn out through the manhole 15, the latter closed and the contents of the receptacle 37 discharged for the separation of the turpentine or other product and solvent, ,which latter is restored to the tank 19. The extractor may then be relled for the succeeding operation. From the foregoing it will be seen that my invention provides a simple typ of apparatus by which the operation of extraction may be quickly, convenientl land economically performed and the so vent recovered for repeated use.

Having thus fully described what is clainied as new, is

1. In an extracting apparatus, `the combination of an extractin tank having an external steam jacket, va ved steam supply pipes connected with the tank and. jacket, a valved filtrate discharge pipe leading from the bottom of the tank, a solvent reservoir arranged above the level onthe tank and having a valved supply pipe communicating therewith, a vaporizer provided with a heating jacket, a valved steam supply pipe communicating therewith, a conducting pipe leading from said filtrate discharge plpe to the vaporizerand provided with a controlling valve therein, a collecting vessel disposed below the level of the tank and vaporizer, a valved pipe connecting said receptacle with the vaporizer, a condenser arranged above the level of the tank, vaporizer and collecting vessel, a conducting pipe leading from the vaporizer to the upper end of the condenser coil and having a controlling valve therein', pipes leading respectively from the lower end of the condenser coil to the tank and collecting vessel the invention,

and provided with valvestherein, a conductmg pipe connected with the upper end of the condenser coil and leading therefrom; to the tank and having a controlling valve, and a sprayer within the tank and communicating with the pipe leading thereto from the lower end of the coil.

2. In an extractin apparatus, the combination of an extracting tank having an external steam jacket, valved steam supply pipes connected with the tank and jacket,

a valved filtrate discharge pipe leading A from the bottom of the tank, a solvent reservoir arranged Yabove the level of the tank and having a valved supply pipe communicating therewith, a vaporizer provided withv a heating jacket, a valved steam supply pipe communicating therewith, a conducting pipe coil and leading t the vaporizer and provided with a controlling valve therein, a collectin vessel disposed below the level of the tan and vapor- 1zer, a valved pipe connecting said receptacle with the va orizer, a condenser arranged above the evel of the tank, vaporizer and collecting vessel, a conducting pipe leading-from the va orizer to the upper end of the condenser co1 and having a controlling valve therein, a conducting pipe connected with the uplper end of the condenser erefrom to the tank and leading from said filtrate discharge pipe to having a controllin ivalve, an exhaust pipe connected with sai conducting pipe at a point between 4said valve and the tank and also provided with a controlling valve, and a sprayer within the tank and communicating with the pipe leading thereto from the lower end of the coil.

In testimony whereof I affix my signature in presence of two witnesses.

CARL H. F. LEMBKE. Witnesses:

BERN HARDl BECKER, ERICH H. LEMBKE. 

